Rotary pump.



N0. 680,722. Patented Aug. 20, I901 IW. MAURAM.

ROTARY PUMP.

Application filed July 21, 1900. (No Model.) 2 Sheets-Sheet l.

WITNESSES @4461? Mam- Patented Aug. 20, I901.

M. mumm.

ROTARY PUMP.

{Application filed July 21, 1900.)

2 Sheets-Sheet 2.

(No Model.)

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MAX MAURAN, OF NIAGARA FALLS, NEW' YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,TO CASTNER ELECTROLYTIC ALKALI COMPANY, OF

VIRGINIA.

ROTARY PU M P.

SPECIFICATION forming part of Letters Patent No. 680,722, dated August20, 1901.

Application filed July 21, 1900. berial No. 24.362. (No model.)

To ctZZ whom it may concern.-

Be it known that 1, MAX MAURAN, mechanical engineer, post-office addressand residence Niagara Falls, New York, have invented certain new anduseful Improvements in Rotary Pumps, of which the following is aspecification with illustrative drawings.

The invention is primarily designed for rotary pumps for pumping strongalkaline solutions, acid solutions, and other corrosive liquids. Thedifficulty to be overcome has been to construct a rotary pump whichshall combine the non-corrodible qualities with satisfactorysimplicity,durability, and efiiciency of the parts.

The nature of the invention will be best understood by the accompanyingdrawings, which illustrate one preferred form.

Figure l is an end view of the pump apparatus with one half or sectionof the casing removed to show the interior construction. Fig. -2 is aside elevation showing the casing, the pump-wings, and certain otherparts in section-on the imaginary plane 2 2 of Fig. 1.

The rotary part of the pump consists, preferably, of a shaft 1),provided with a disk or head 0 within the casing of the pump, and adriving-pulley d. The wings f or vanes of the pump are preferably ofearthenware and formed in one single piece with the centralsupporting-disk g, which is recessed and fits over the disk or head 0 ofthe shaft b. Bolts h secure the wings to the disk 0. The boltheads maylie in recesses in the earthenware pump-wings, as shown, and be coveredand protected by a non-corrodible cementj. The other ends of the boltsand the entire rear surface of the disk 0 are covered or embedded in alayer of the non-corrodible cement 70. To protect the shaft 1) where itprojects through the packing-box of the pump, a sleeve Z, of a suitablyhard non-corrodible material-such, for example, as the well-knowncompounds of rubber and asbestos that are sometimes used for electricalinsulating material and for battery-cells-is provided. This sleeve Zextends into and is embedded in the layer of cement 7c.

The pump-casing may consist of sections, preferably two, up, made ofearthenware and bolted together and having the joint or union betweenthem suitably luted or sealed. The casing is provided with the usualperipheral or tangential discharge-opening. The section 19 has a centralopening to receive the shaft and is provided with a packing-box r andadjustable packing sleeve or follower s. secured and adjusted by boltst. Instead of fastening the bolts t directly in the earthenware andendangering the breakage of the earthenware plugs or bushings a, of leador other relatively soft material, are cast and secured in recesses, asshown in the casing, and the bolts 15 embedded or secured in thesebushings. The section 02 of the pump-casing has the centralinlet-openingo, around which are secured bolts to by means of leadbushings, similarly to the bolts 15. A tight joint between theinlet-pipe 0c and the earthenware may be secured by interposing apacking-ring y and drawing up the pipe 00 by means of the bolts to, soas to compress the packingring y and form a tight joint without dangerof breaking the earthenware. The pipe to is shown flanged at its end andsurrounded by collars 2', upon which the bolts 10 act, as set forth inmy other application, filed March 22, 1900, Serial No. 9,681. Thepresent invention is not limited to such form of attaching the bolts toto the pipes 00. The dischargepipe so may be secured in the same manner,the details of which are not repeated in the drawings.

The pipe-casing is preferably secured to the same bed or base thatcarries the bearings for the shaft 19.

After the parts have been assembled and adjusted the vanes turn freelywithin the casing without touching, though of course a close fit isdesirable. The solution or liquid to be pumped flows in through the pipew and inlet o and is discharged by the wings peripherally to the pipeas. The only point of contact and wear between the rotary parts and thecasing is the sleeve r, which is surrounded by the packing in thepacking-box. The packing material is omitted from the box in the figuresfor the sake of more clearly illustrating the construction. The wearupon the sleeve 1" is very slight.

All the rotary 10o parts that are within the casing inside of the Thecharacteristic and patentable features which I claim as new, and desireto secure by these Letters Patent, are the following:

1. In a rotary non-corrodible pump and for the purposes explained, thecombination of an earthenware chamber consisting of detachable sections,a rotary shaft entering the said chamber and provided with an enlargedend or head, a non-corrodible sleeve carried by the shaft, a packingdevice surrounding the said sleeve, an earthenware disk provided withWings and secured to the face of the said shaft-head, and a layer ofprotective material extending from the said sleeve to the said disk andprotecting the said shaft-head.

2. In a rotary non-corrodible pump and for the purposes explained, thecombination of 'a protective coating protecting the portions of theshaft from exposure to the liquid, the said wings being secured to thedisk or head by bolts embedded in the said protective coatings.

Signed this 25th day of June, 1900, at Niagara Falls, New York.

MAX MAURAN.

Witnesses:

ANNIE V. MULLIN, ROBERT L. Bron.

I I g

